**HP Prime Software Version 7820**

DISCLAIMER: I am not an employee of
Hewlett Packard.

Rev. 7820, 4/27/2015.

The above link provides files for the calculator, connectivity kit, and
emulator.

Shout out to Tim Wessman, cyrille
de brÃ©bisson, and the HP Calculator Group.

Let’s take a look at some of the
new features with Version 7820 (4/27/2015):

**Draw a Function**

This blows me away. I don’t think posting still pictures shows
this new feature justice. You can sketch a function by your finger (or
mouse if you are using the hardware), and Prime draws a function that fits your
sketch. Furthermore, the function is
defined and can be analyzed just as if you typed the functions on the Symb
screen. The sketch function draws
functions of the following types: linear,
quadratic, exponential, natural logarithmic, and sinusoidal. To access this
feature, go to the Plot screen, select Menu, then

Fcn, and Sketch… (option 1).

**Date Functions**

One of my favorite calculator
functions of all time is the days between dates function. Usually, this function is found mostly on
financial calculators and some graphing calculators. I am happy to report that the days between
dates function (DDAYS) has finally made it to the HP Prime (a user program is
no longer needed).

DDAYS(date1, date2): calculate the days between date1 and
date2. Dates follow this format: yyyy.mmdd.
This is the international date format (ISO standard): year, month, date.

DATEADD(date, n): This determines the date n days from the
specified date, where n can be positive (determining a future date) or negative
(determining a past date).

DAYOFWEEK(date): Returns the day of the week of a certain
date.

1 – Monday

2 – Tuesday

3 – Wednesday

4 – Thursday

5 – Friday

6 – Saturday

7 – Sunday

These functions are found in the
catalog or if you are in programming mode, through the Cmds-More menu.

**Product Template**

A new template to calculate the
product of the function is added. This
template works well in both the Home and the CAS modes.

**Pie Graph and Other 1-Variable Stat Plots**

The HP Prime has an official pie
graph feature in the Statistics1Var app.
Additional plots also include dot, stem and leaf, and control. Stem and leaf plots are tables where numbers
are arranged by their last digit (leaf) by their first digit(s) (stem).

**Renaming of Columns, Mark Options in the Statistics Apps**

Columns that used in the Statistics1Var
and Statistics2Var apps are no longer restricted to the names C0 – C9. Each column can contain up to 10,000 entries. In the Symb menu, you can determine the color
of the regression curve (2Var) and the markers.

To note, the symbolic variables of
the Statistics2Var have changed. Gone are
the S1Type through the S5Type. The
variables S1 through S5 have been expanded.
S1 through S5 are lists containing the following items:

{ independent column, dependent column, frequency column (can be
blank), regression equation, plot type, color of the plot, mark type, color of
the mark}

Plot Types:

1 – Linear

2 – Logarithmic

3 – Exponential

4 – Power

5 – Exponent

6 – Inverse

7 – Logistic

8 – Quadratic

9 – Cubic

10 – Quartic

11 – Trigonometric

12 – Median-Median (new plot type)

13 – User Defined

Mark Types:

1 – small open circles

2 -
boxes

3 -
thin “X”s

4 -
crosses

5 -
thick diamonds

6 -
thick “X”s

7 -
solid circles

8 -
thin diamonds

9 -
large open circles

**Expanded EDITLIST and EDITMAT**

Both EDITLIST and EDITMAT have
expanded capabilities. You can add a
title and make said list/matrix read-only. The general format is:

EDITLIST(list variable or list,
title as a string, read-only indicator)

EDITMAT(matrix variable or matrix,
title as a string, read-only indicator)

The read-only indicator only needs
to have any number other than zero to make such object read-only. Both the title and read-only indicator
arguments are optional.

**Universal Setting Variables and Application Basic Setting
Variables**

The HP Prime now differentiates
between universal setting variables (HAngle, HFormat, etc.) from application
specific setting variables (AAngle, AFormat, etc.).

**Additional Distribution Functions**

New density, cumulative, and
inverse (lower tail) distribution functions are available for the following
distributions:

Beta: beatad, beatad_cdf, betad_icdf

Exponential: exponential,
exponential_cdf, exponential_icdf

Gamma: gammad, gammad_cdf, gammad_icdf

Geometric: GEOMETRIC, GEOMETRIC_CDF, GEOMETRIC_ICDF

Negative Binomial: negbinomial,
negbinomial_cdf, negbinomial_icdf

Uniform: uniform, uniform_cdf, uniform_icdf

Weibull: weibull, weibull_cdf, weibull_icdf

All these functions can be found in
the catalog.

Additional random number generators
based on the binomial, chi square, fisher, geometric, Poisson, and student
distribution has been added in the catalog.
The new random generators have the prefix “rand”.

**Programming: Running the
Programs through the Catalog ([Shift] + [ 1 ]) allows non-real input**

It used to be that if you ran
programs through the Program Catalog, we could only input real numbers as
entries. Thankfully, that is no longer
the case. Now we can input lists,
matrices, and complex numbers.

**One Directional Limits**

The limit function now allows the
use of plus and minus symbols to determine one-directional limits. It won’t sing One Direction songs though
(thankfully!).

This is just a few of the new
features. There is **A LOT** more detailed information about the above and all the new
features, including improved copy and paste procedures, 1 way ANOVA analysis,
display of graphic objects G0 through G9 on the home screen, and upper and
lower case text conversion functions, included in the documentation of the new
firmware.

All the future programs posted on
this blog will be done using the Version 7820 firmware.

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**The Museum of HP Calculators**

Here a great place to discuss calculators, specifically HP calculators.
It is a really great place for HP calculator owners. The link to
the forum is here: http://www.hpmuseum.org/forum/.

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Eddie

This blog is property of Edward
Shore. 2015.